Lens driving device, camera module and electronic equipment

Abstract

The utility model relates to a lens driving device, a camera module and an electronic device, comprising a pedestal, a plurality of conductive members embedded in the pedestal, a plurality of groups of driving coils arranged on the pedestal, each group of driving coils being electrically connected with at least one conductive member, and a group of driving magnets corresponding to each group of driving coils at intervals. At least one group of the driving coils and the driving magnets are matched to drive the movable frame to move in the axial direction of the optical axis, and the rest of the driving coils and the driving magnets are matched to drive the carrier to move in the plane perpendicular to the optical axis. The device has the advantages that the conductive part is directly connected with the driving unit, so that a circuit board is not required to be arranged in the device, and the problems of signal interference and stability are greatly reduced; and meanwhile, the arrangement of a circuit board and the embedding of a conductive piece in the base are omitted, so that the occupied space in the device is further reduced, and a smaller device size, lighter weight, lower cost and higher reliability are obtained.

Description

TECHNICAL FIELD

[0001] The utility model belongs to digital photography parts field especially, relate to a lens drive device, camera module and electronic equipment. BACKGROUND

[0002] Lens drive device as the key element in optical system, is widely used in camera, microscope, spectrum analyzer, projector and other equipment, its function mainly realizes the accurate positioning and high -efficient focusing of lens. With the rapid development of optical technology, the performance requirement of lens drive device is unceasingly improved, especially in high precision, small shift, high speed regulation and stability and so on demand is increasing day by day.

[0003] In prior art, in order to realize multidimensional motion control, such as focal length adjustment and angle adjustment, drive device needs to integrate more execution mechanism and control module. This integration further increases the complexity of circuit, brings more signal interference and stability problems, and complex circuit board needs larger area to place numerous components and connecting lines, limits the application of drive device in small-sized equipment. Especially in mobile device, the volume and weight limit makes the traditional large-scale circuit design difficult to adapt. SUMMARY

[0004] The utility model aims at above -mentioned problem provides a lens drive device, camera module and electronic equipment that can solve above -mentioned technical problem.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme:

[0006] Lens drive device, including base, in the base embeds several conductive parts, is equipped with several groups of drive coils on the base, every group of drive coil is electrically connected with at least one conductive part, and every group of drive coil is spaced apart from a group of drive magnet, at least one group of drive coil and drive magnet cooperate to drive the movement of the frame in the optical axis axial direction, and the remaining drive coil and drive magnet cooperate to drive the movement of the carrier in the plane perpendicular to the optical axis.

[0007] Further, every group of drive coil includes at least one coil body distributed in parallel with the optical axis.

[0008] Further, several fixing positions for fixing the drive coil are arranged on the base, and one group of drive coil is fixed in each fixing position.

[0009] Further, one end of the conductive part is exposed to the fixing position and is electrically connected with the drive coil, and the other end of the conductive part is exposed to the base.

[0010] Further, the base is provided with a retaining wall circumferentially arranged along the driving coil, and the fixing position is arranged on the inner wall of the retaining wall.

[0011] Further, the remaining driving coils are divided into at least two groups, one group of the driving coils has at least two coils arranged along a first direction, and the remaining group of the driving coils has at least two coils arranged along a second direction.

[0012] Further, the movable frame and the base are connected through a group of guide shafts.

[0013] Further, the carrier is arranged in the movable frame, and the carrier is movably connected with the movable frame through a group of rolling balls.

[0014] Further, the lens driving device further comprises a metal reinforcing member embedded in the movable frame, and the metal reinforcing member is fixedly connected with a baffle arranged on the top surface of the movable frame, and the baffle is fixedly connected with a buffer.

[0015] As an application scheme, the application further provides a camera module comprising the lens driving device.

[0016] As an application scheme, the application further provides an electronic device comprising the camera module.

[0017] Compared with the prior art, the lens driving device has the advantages that the conductive member is directly connected with the driving unit, so that the circuit board arranged in the device is avoided, and the signal interference and stability problems are greatly reduced; meanwhile, the circuit board is avoided, and the conductive member is embedded in the base, so that the space occupation in the device is further reduced, and smaller device volume, lighter weight, lower cost and higher reliability are obtained. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 As an application scheme, the application further provides a camera module comprising the lens driving device.

[0019] Figure 2 As an application scheme, the application further provides a camera module comprising the lens driving device.

[0020] Figure 3 As an application scheme, the application further provides a camera module comprising the lens driving device.

[0021] Figure 4 As an application scheme, the application further provides a camera module comprising the lens driving device.

[0022] Figure 5 As an application scheme, the application further provides a camera module comprising the lens driving device.

[0023] Figure 6 An example schematic diagram for the electronic device in Example Three.

[0024] In the figure, base 1, conductive part 10, fixing position 11, retaining wall 12, drive coil 2, drive magnet 3, carrier 4, magnetic attraction part 40, moving frame 5, metal reinforcing part 50, baffle 51, guide shaft set 6, guide shaft 60, guide shaft sliding slot 61, ball set 7, plane xY, optical axis Z. DETAILED DESCRIPTION

[0025] The utility model will be made further detailed explanation in combination with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not limit the utility model. In addition, it needs to be explained that in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0026] In the description of the utility model, unless there are explicit provisions and limitations, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0027] In the utility model, unless there are explicit provisions and limitations, the first feature is "on" or "below" the second feature, which can include the direct contact of the first and second features, or the contact of the first and second features through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0028] In the description of the embodiment, the terms "up", "down", "right", "left" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the utility model. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0029] Example One

[0030] AsFigure 1 As shown, the lens driving device includes a base 1 for supporting components, and a plurality of conductive elements 10 arranged according to a design are embedded in the base 1. The conductive elements 10 are directly embedded in the base 1 by means of integral injection molding or other methods. The advantage of this is that it greatly reduces the space occupied by the power supply circuit in the cavity of the base 1, and at the same time, it also improves the structural strength of the base 1 to a certain extent.

[0031] In addition, such as Figures 2-3 As shown, a plurality of sets of drive coils 2 are provided on the base 1. Each set of drive coils 2 is electrically connected to a conductive element 10, and each set of drive coils 2 is spaced apart by a set of drive magnets 3. At least one set of drive coils 2 and drive magnets 3 cooperate to drive the moving frame 5 to move along the optical axis Z. The remaining drive coils 2 and drive magnets 3 cooperate to drive the carrier 4 to move in the plane xY perpendicular to the optical axis Z. In other embodiments, at least one set of drive coils 2 and drive magnets 3 cooperate to drive the carrier 4 to move along the optical axis Z. The remaining drive coils 2 and drive magnets 3 cooperate to drive the moving frame 5 to move in the plane xY perpendicular to the optical axis Z. The carrier 4 is connected within the moving frame 5 by an elastic element.

[0032] The carrier 4 is also embedded with a magnetic suction element 40. The driving magnet 3 fixed to the carrier 4 is fixed to the carrier 4 by adsorbing onto the magnetic suction element 40, thereby ensuring that the driving magnet 3 always keeps in close contact with the carrier 4 during the movement, and avoids displacement caused by shaking or external interference.

[0033] The lens drive mechanism is designed to achieve efficient and precise adjustment of optical components, ensuring stable operation within the optical imaging system. Through the optimization of the aforementioned structure, the base 1 not only provides robust support for each component but also achieves excellent electrical connections, further enhancing the device's performance.

[0034] Specifically, the electrical connection between each set of drive coils 2 and the conductive element 10 ensures a stable current flow, which significantly impacts the drive's response speed and accuracy. The drive magnet 3 generates a magnetic field, effectively driving the moving frame 5 to move along the optical axis Z. Simultaneously, another set of drive coils 2 and drive magnet 3 work together to drive the carrier 4 to move within a plane xY perpendicular to the optical axis Z. This design allows the lens to be fine-tuned in multiple dimensions, ensuring optimal imaging quality even in complex optical environments.

[0035] The one end of the conductive part 10 is exposed to the fixing position 11 and is electrically connected with the driving coil 2, which simplifies the path of circuit connection, ensures the stability of current flow and the accuracy of signal transmission, and avoids the complex connection and potential signal attenuation problems of the traditional circuit board. Moreover, the other end of the conductive part 10 is exposed to the base 1, which facilitates the connection with the external power supply or control module.

[0036] Moreover, each group of driving coils 2 includes at least one coil body distributed parallel to the optical axis Z, i.e., the winding axis of the coil body is perpendicular to the optical axis Z; and each group of driving coils 2 is a hollow coil without an embedded circuit board, which is directly powered by the embedded conductive part 10, thereby simplifying the structure and effectively saving space. The design of the hollow coil allows the power supply to be directly introduced into the coil, avoiding the additional volume and complex connection mode caused by the traditional circuit board, thereby reducing potential connection errors and failure risks.

[0037] Further, the driving coils 2 have three groups, two of which are parallel to each other and distributed along a first direction; and the remaining one is distributed along a second direction. In this embodiment, one group of the above-mentioned driving coils 2 distributed along the first direction is used to drive the moving frame 5 to move axially along the optical axis Z, and the remaining one group of driving coils 2 distributed along the first direction and one group of driving coils 2 distributed along the second direction jointly drive the carrier 4 to move in the plane xY perpendicular to the optical axis Z. The remaining one group of driving coils 2 distributed along the first direction has at least two coils distributed along the first direction; and one group of driving coils 2 distributed along the second direction has at least two coils distributed along the second direction, which can compensate for the deflection of the moving frame 5 when moving in the first direction and the second direction through the two coils in the same direction according to position detection and position feedback.

[0038] In addition, a guide shaft group 6 is arranged between the base 1 and the moving frame 5 to cooperate with the driving, which is at least partially fixed to the above-mentioned base 1, and the moving frame 5 is in sliding connection with the guide shaft group 6; and the carrier 4 is located in the moving frame 5, and the carrier 4 is movably connected with the moving frame 5 through a ball group 7. Specifically, the guide shaft group 6 includes guide shafts 60 and guide shaft sliding grooves 61, either of which is arranged in the base 1, and the remaining one is arranged in the moving frame 5, and the two are relatively stable in sliding, ensuring the accuracy of the movement trajectory of the moving frame 5 in the direction of the optical axis Z; and the ball group 7 is uniformly distributed between the carrier 4 and the moving frame 5, and the balls form point or surface contact with the moving frame 5 and the carrier 4, which can effectively reduce friction and improve the flexibility of movement, so that the carrier 4 does not deviate when moving in the plane xY, ensuring that the carrier 4 remains stable under high frequency or complex motion mode.

[0039] Further, in the working environment, the lens driving device cannot avoid the shaking in the optical axis Z direction. In order to avoid the shift of the carrier 4 in the optical axis Z direction during the movement, a metal reinforcing member 50 is embedded in the moving frame 5. The metal reinforcing member 50 is attracted to the driving magnet 3 fixed on the carrier 4, so that the carrier 4 and the moving frame 5 are always in the state of adhesion. In addition to the above function, the metal reinforcing member 50 is also used to adsorb the driving magnet 3 fixed on the moving frame 5, and further prevents the carrier 4 from shifting, as shown in Figure 5 In this embodiment, the moving frame 5 is also provided with a baffle 51 fixedly connected with the metal reinforcing member 50. The baffle 51 is arranged on the top surface of the moving frame 50, and a buffer member is fixedly connected on the baffle 51. The carrier 4 is specifically arranged between the baffle 51 and the moving frame 5. The baffle 51 provides additional restriction for the carrier 4 to prevent it from shifting or swinging excessively during the movement. The baffle 51 is connected with the metal reinforcing member 50, which ensures that the movement range of the carrier 4 in the optical axis Z direction is strictly controlled, thereby avoiding the position error caused by external interference or shaking. In this embodiment, the buffer member is a high-elastic rubber material or a similar flexible medium. By utilizing the flexible characteristics of the buffer member, a certain buffer space is provided, which can effectively absorb and disperse the mechanical impact and vibration generated during the movement, thereby reducing the interference to the device and ensuring the stability and clarity of the device imaging.

[0040] As shown in Figure 4 In the design of the base 1, in order to ensure the stability and reliability of the driving coil 2, a plurality of fixing positions 11 for fixing the driving coil 2 are provided. These fixing positions 11 are accurately embedded in the structure of the base 1, which ensures that each group of driving coils 2 can be firmly fixed at the predetermined position. Specifically, the base 1 is provided with a baffle wall 12, and the fixing positions 11 are arranged on the inner wall of the baffle wall 12, further stabilizing the driving coil 2. Through this fixing mode, the position of the driving coil 2 on the base 1 is highly stable, which can ensure that the magnetic field generated thereby has good symmetry and consistency, thereby effectively driving the movement of the driving magnet 3 and the moving frame 5.

[0041] Embodiment Two

[0042] The structure and principle of this embodiment are basically the same as those of embodiment one. The difference between the two embodiments is that the lens driving device of the above-mentioned embodiment one comprises a lens driving device.

[0043] A camera module is a device used to adjust the position or focal length of a lens, usually through mechanical, electric or other means. The main function of a camera module is to adjust the position of the lens to achieve control over the focal length, focusing or focusing of the optical system. A camera module refers to a modular component that integrates a camera, lens, sensor and other related components. A camera module usually includes image sensors, image processors, lenses, optical filters, focal length adjusters, autofocus modules and other components, which can be directly used in various devices and applications such as smartphones, tablets, surveillance cameras, vehicle-mounted cameras, etc.

[0044] Embodiment three

[0045] The structure and principle of this embodiment are basically the same as those of embodiment two, and the difference lies in that the electronic device of this embodiment includes a camera module for the camera module of the above-mentioned embodiment two.

[0046] As shown in Figure 6 , the electronic device includes a camera module, and the electronic device refers to a device that uses electronic components and circuit technology to achieve a specific function. These devices are widely used in daily life, industrial production, scientific research and other fields. Common electronic devices include computers, smartphones, televisions, cameras, etc. They perform various operations such as information processing, communication, entertainment and home control through the processing and transmission of electronic signals.

[0047] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A lens driving device comprising a base (1) in which a plurality of conductive members (10) are embedded, characterized in that, A plurality of groups of drive coils (2) are provided on the base (1), each group of drive coils (2) is electrically connected with at least one conductive member (10), and each group of drive coils (2) is spaced apart from a corresponding group of drive magnets (3), at least one group of drive coils (2) and drive magnets (3) cooperate to drive the moving frame (5) to move in the optical axis (Z) axial direction, and the remaining drive coils (2) and drive magnets (3) cooperate to drive the carrier (4) to move in the plane (xY) perpendicular to the optical axis (Z).

2. The lens driving device according to claim 1, characterized by A plurality of fixing positions (11) for fixing the drive coils (2) are provided on the base (1), and each fixing position (11) is fixed with a group of drive coils (2).

3. The lens driving apparatus according to claim 2, wherein One end of the conductive member (10) is exposed from the fixing position (11) and is electrically connected with the drive coil (2), and the other end of the conductive member (10) is exposed from the base (1).

4. The lens driving apparatus according to claim 2, wherein The base (1) is provided with a retaining wall (12) at least along the drive coil (2) part circumferentially, and the fixing position (11) is arranged on the inner wall of the retaining wall (12).

5. The lens driving apparatus according to claim 1, wherein The remaining drive coils (2) have at least two groups, one of which has at least two coils distributed along a first direction; the remaining group of drive coils (2) has at least two coils distributed along a second direction.

6. The lens driving apparatus according to claim 1, wherein The moving frame (5) and the base (1) are slidably connected by a guide shaft group (6).

7. The lens driving apparatus according to claim 1, wherein The carrier (4) is located in the moving frame (5), and the carrier (4) is movably connected with the moving frame (5) by a ball group (7).

8. The lens driving apparatus according to claim 1, wherein The lens driving device further comprises a metal reinforcing member (50) embedded in the moving frame (5), and the metal reinforcing member (50) is fixedly connected with a baffle (51), the baffle (51) is arranged on the top surface of the moving frame (5), and a buffer member is fixedly connected on the baffle (51).

9. A camera module characterized by, The camera module comprises the lens driving device according to any one of claims 1-8.

10. An electronic device, characterized by The electronic device comprises the camera module according to claim 9.

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